{"id":10761,"date":"2012-01-27T08:38:00","date_gmt":"2012-01-27T16:38:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/life-discovered-on-dead-hydrothermal-vents\/"},"modified":"2023-04-19T11:20:20","modified_gmt":"2023-04-19T18:20:20","slug":"life-discovered-on-dead-hydrothermal-vents","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/life-discovered-on-dead-hydrothermal-vents\/","title":{"rendered":"Life Discovered on Dead Hydrothermal Vents"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n  \n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a 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visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Scientists at USC have uncovered evidence that even when hydrothermal sea vents go dormant and their blistering warmth turns to frigid cold, life goes on.<\/p>\n<p>Or rather, it is replaced.<\/p>\n<p>A team led by USC Dornsife microbiologist Katrina Edwards found that the microbes that thrive on hot fluid methane and sulfur spewed by active hydrothermal vents are supplanted, once the vents go cold, by microbes that feed on the solid iron and sulfur that make up the vents themselves.<\/p>\n<p>The findings&nbsp;&mdash; based on samples collected for Edwards by U.S. Navy deep sea submersible Alvin (famed for its exploration of the Titanic in 1986) &mdash; provide a rare example of ecological succession in microbes.<\/p>\n<p>The findings were published in an<span class=\"Apple-converted-space\">&nbsp;<\/span><em>mBio<\/em><span class=\"Apple-converted-space\">&nbsp;<\/span>article authored by Edwards, USC postdoctoral researcher Jason Sylvan and Brandy Toner of the University of Minnesota.<\/p>\n<p>Ecological succession is the biological phenomenon whereby one form of life takes the place of another as conditions in an area change &mdash; a phenomenon documented in plants and animals.<\/p>\n<p>For example, after a forest fire, different species of trees replace the older ones that stood for decades.<\/p>\n<p>Scientists long have known that active vents provided the heat and nutrients necessary to maintain microbes. But dormant vents &mdash; lacking a flow of hot, nutrient-rich water &#8211; were thought to be devoid of life.<\/p>\n<p>Hydrothermal vents are formed on the ocean floor with the motion of tectonic plates. Where the sea floor becomes thin, the hot magma below the surface creates a fissure that spews geothermally heated water &#8211; reaching temperatures of more than 400 degrees Celsius.<\/p>\n<p>After a geologically brief time of actively venting into the ocean, the same sea floor spreading that brought them into being shuffles them away from the hotspot, and the vents grow cold and dormant.<\/p>\n<p>&ldquo;Hydrothermal vents are really ephemeral in nature,&rdquo; said Edwards, professor of biological sciences in USC Dornsife.<\/p>\n<p>Microbial communities on sea floor vents have been studied since the vents themselves were discovered in the late 1970s. Until recently, little attention had been paid to them once they stopped venting.<\/p>\n<p>Sylvan said he would like to take samples on vents of various ages to catalog exactly how the succession from one population of microbes to the next occurs.<\/p>\n<p>Edwards, who recently returned from a two-month expedition to collect samples of microbes deep below the ocean floor, said that the next step will be to see if the ecological succession is mirrored in microbes that exist beneath the surface of the rock.<\/p>\n<p>&ldquo;The next thing is to go subterranean,&rdquo; she said.<\/p>\n<p>The research was funded by the W. M. Keck Foundation, the Gordon and Betty Moore Foundation, the National Research Council and NASA postdoctoral fellowship programs.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":0,"featured_media":10764,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[117,1341,96,1754],"class_list":["post-10761","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","tag-biology","tag-katrina-edwards","tag-natural-sciences","tag-ocean"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Life Discovered on Dead Hydrothermal Vents<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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